165. The global minimum tax got left behind. What's next?

Episode Summary

Executive Summary: The episode explains how the Inflation Reduction Act advanced U.S. climate, health, and domestic tax policy but stopped short of implementing the OECD’s global minimum corporate tax. Through Kim Clausing, it traces the history of profit shifting, tax havens, and OECD negotiations, and argues that without country-by-country minimum taxation, the race to the bottom and international tax conflict remain unresolved.

Main Topics: Origins of the international corporate tax system (Priority: 5/5): Clausing explains that international tax rules evolved from treaties aimed at preventing double taxation, not from a true multilateral tax authority. As trade and multinational firms became more mobile, the old system became less adequate for taxing cross-border corporate income. Profit shifting, tax havens, and intangible capital (Priority: 5/5): The discussion details how multinationals increasingly move paper profits—not factories—to low-tax jurisdictions, especially through intangible assets like patents, trademarks, and royalties. This creates opportunities for tax minimization across many industries. The 2017 U.S. tax law and its limits (Priority: 5/5): The Tax Cuts and Jobs Act introduced GILTI and BEAT as partial minimum-tax measures, but because GILTI averages income across countries, it still preserves incentives to shift profits offshore and can even favor foreign high-tax jurisdictions over the U.S. OECD global minimum tax negotiations (Priority: 5/5): The OECD process sought a coordinated country-by-country minimum tax, culminating in a 2021 agreement among about 135 countries. This was presented as a major multilateral breakthrough to stop the race to the bottom. Inflation Reduction Act and the missed international tax opportunity (Priority: 5/5): Although the IRA included a 15% corporate alternative minimum tax, it did not adopt the OECD’s country-by-country framework. Clausing argues that this makes the U.S. rule noncompliant with the global deal and limits its effectiveness. Trade tensions and digital services taxes (Priority: 4/5): Unilateral digital services taxes in countries like France targeted major U.S. tech firms and triggered U.S. retaliation threats. This turned a tax-policy dispute into a broader trade issue involving Section 301 and potential tariffs. Future paths after U.S. inaction (Priority: 4/5): The episode closes by outlining three possible futures: U.S. alignment with the global agreement, retaliatory trade conflict, or collapse of the OECD process if other countries lose confidence in U.S. participation.

Key Arguments: International corporate tax lacks a true multilateral authority; it relies on national laws and treaties that were designed mainly to prevent double taxation, not profit shifting. Modern multinational firms can separate real economic activity from reported profits, making paper profits highly sensitive to tax differences across countries. Low-tax jurisdictions often attract reported profits rather than real productive activity; profits per worker in havens can be vastly above global averages. Intangible capital makes tax avoidance easier because the location of value creation is ambiguous and can be structured through subsidiaries, royalties, and ownership chains. The 2017 U.S. minimum taxes were partial fixes, but because they averaged income across jurisdictions they still rewarded offshore profit shifting. A country-by-country minimum tax is the key policy mechanism needed to stop undercutting and end the race to the bottom. Digital services taxes became politically toxic because many were explicitly discriminatory against U.S. firms, making them resemble trade barriers. The OECD agreement was a major breakthrough because it aligned roughly 135 countries, representing about 95% of world GDP, around a common minimum-tax framework. The Inflation Reduction Act’s domestic minimum tax is not the same as the OECD deal, so it does not fully solve the global coordination problem. If the U.S. does not conform to the OECD framework, foreign top-up taxes may still apply to U.S. companies, creating uncertainty and possible pressure for future policy change.

Data Points: Global agreement participants: about 135 countries - Countries that endorsed the OECD political agreement on a global minimum tax in 2021 Share of world GDP: about 95% - Approximate economic weight of the countries in the OECD agreement OECD global minimum tax rate: 15% - The negotiated minimum corporate tax rate in the multilateral deal Biden campaign proposal: 21% - The country-by-country minimum tax rate initially proposed by the Biden campaign U.S. corporate minimum tax under TCJA GILTI: 10.5% - Average minimum tax on foreign income under the 2017 Tax Cuts and Jobs Act, as described in the episode Minimum tax under IRA: 15% - The corporate alternative minimum tax adopted in the Inflation Reduction Act Minimum tax rate on firms that paid zero federal income tax: 15% - Biden’s statement that large corporations should pay at least 15% rather than zero Companies cited as paying zero tax: 55 - Biden referenced 55 companies that reportedly paid no federal income tax on substantial profits Profit amount in Biden example: $40 billion - The amount of profit associated with those companies in the speech excerpt Typical employee abroad profit average: about $40,000 - Clausing’s estimate of worldwide average profit per employee for U.S. multinationals abroad Profits per employee in light-tax jurisdictions: 10x to 1,000x the worldwide average - Illustrates how much reported profit can be shifted to havens relative to actual activity

Pivotal Quotes: "the American people won and the special interests lost" — Joe Biden: Opening framing of the Inflation Reduction Act as a political and economic victory "the basic root of all of these strategies is the same ... which is to get the profits reported in the lightly taxed jurisdictions" — Kim Clausing: Explaining how multinational tax planning works across patents, royalties, debt, and ownership chains "what we were hoping to solve" — Kim Clausing: On the OECD/global minimum tax, emphasizing that the IRA did not fully resolve the collective-action problem

Implications: The IRA improved domestic taxation but left global tax coordination unresolved. Future U.S. action, or foreign top-up taxes, will determine whether multinationals face a stable worldwide floor or renewed trade and tax conflict.